The drive motor controller of an electric vehicle is the control core of the entire vehicle driving system. It determines the drive motor according to the electric signal information such as the gear lever position (forward, reverse, neutral, high speed, low speed), accelerator pedal, brake, and power battery remaining power. The speed and torque commands are used to control the operation of the drive motor. This is actually the command data calculated by the control system according to various information to provide the current required to drive the motor.